Process and arrangement for manufacturing open-end and open-side envelopes from paper or similar material



l Sept. 2, 1930. A, WINKLER El' AL PROCESS AND ARRANGEMENT FORMANUFACTURING OPEN END AND OPEN sInEENvELoPEs FROM PAPER 0R SIMILARMATERIAL 5 Sheets-Sheet .Filed Nov. 6. 1926 INVENToIg.

Sept.' 2, 1930. A W|NK| ER ET AL 1,774,536

PROCESS AND ARRANGEMENT FOR MANUFACTURING OPEN END AND OPEN SIDEENVELOPES FROM PAPER OR SIMILAR MATERIAL FledNov. 6, 1926 5 Sheets-Sheet2 Sept. 2, 1930. A, W|NKLEREV AL 1,774,536

PROCESS AND ARRANGEMENT FOR MANUFACTURING OPEN END', AND

QPEN SIDE ENVELOPES FROM FAPER 0R SIMILAR MATERIAL Filed Nov. 5, 1926 5Sheets-Sheet 3 Max Hannah/'ar A TTORNE YS.

Sept. 2, 1930. A, wlNKLER ll'V AL 1,774,536

1 PROCESS AND ARRANGEMENT FOR MANUFACTURING OPEN END AND OPEN SIDEENvELoPEs FROM PAPER 0R SIMILAR MATERIAL Filed NGV. 6. 1926 5sheets-sheet' 4 TORNEYS.

Sept. 2, 1930. A. wlNKLl-:R ET AL 1,774,536

PROCESS AND ARRANGEMENT FOR MANUFACTURING OPEN END AND OPEN SIDEENVELOPES FROM PAPER OR SIMILAR MATERIAL Filed Nov. 6, 1926 5Sheets-Sheet 5 f4 H fred /n/f/ef' BY A AT'TORNEYS.'

Patented Sept. 2, 1930 UNITED STATES PATENT OFFICE PROCESS ANDABRANGEMENT FOR MANUFACTURING OPEN-END AND OPEN-SEE N- 'VELOPES FROMPAPER Clitl SIMILAR MATERIAL Application iiled November 6, 1926, SerialNo. 146,837, and in Germany November 8, 1925.

Our invention relates t6 envelope making machines and more particularlyto a ma'- chine of the rotary type for making open end envelopes; theprincipal objectyof the invention being to reduce the dimensions ofmachines of this type by advantageous arrangement of the working parts,including mechanism for initially folding the blanks to reducethespacing between successive operations.

By reason of our improvement we are able to increase factory capacity byinstallation of a greater number of machines in a given floor space andto increase the capacity of individual machines because of the closerspacline adjacent the left hand side of the ma-` chine. p

Fig. 2 is an enlarged longitudinal vertical section ofthe stack tableand initial folding scoring, gumming and sealing rolls.

Fig. 3 is an enlarged detail elevation of the initial folding mechanism.

Fig. 4 is a plan view of the stack table illustrating a' stack of blanksthereon.

Fig. 5 is an enlarged front elevation of the set of initial scoring,gumming,` and sealing rolls.

Fig. 6 is an enlarged plan view 0f the secondary set of rolls.

Fig. 7 is an enlarged cross section on the line 7 -7, Fig. 6,particularly illustrating the end Hap-forming mechanism.

Figs. 8 to 14 are plan views illustrating the various steps of formingthe blank into an envelope: Fig. 8 illustrates the virgin blank, Fig. 9the initial fold and scorin for the second fold, Fig. 10 gumming oftheack Hap, Fig. 11 sealingA of the back flap and projected into theframe to anchor the arms 4the frame bed plate, back of the transversescoring of the bottom flap, Fig. 12 folding ofthe end flaps, Fig. 13umming of the botfom flap, and Fig. 14 t e completed enve- .Ope-

Referring more in detail to the drawings:

1 and 2 designate right and left side frame standardssupportinghorizontal bed plates 3 and 4 which extend rearwardly from the standardsand have upward front extensions 5 and 6. Mounted on the extensions 5and 6 is a table 7 having slots 8 and supported on said table is askeleton. frame 9 adjustably anchored to the ytable by bolts 10 whichexltend through the slots 8 and through arcuate slots 1,1 in the frame;the bolts having heads 12 engageable with the under side of the tableand 'nuts 13 engageable with the top ofthe frame so that when the boltsare loosened thel frame may be moved to adjusted positionv and when thebolts are tightened, the frame is held rigidly in place. y

15 designates stack guides mounted on, arms 16 which overlie the frame 9and have slots 17 through which. cap screws 18 are in adjusted position.It is apparent that with this arrangement stacks of blanks of differentcontour and dimension may be centered on the table.

"The table 7 is provided-with a central, transverse opening 19 throughwhich blanks from the stack may be drawn into the operatin mechanism.

ounted on the upward extensions 5, 6 of center of the opening 19 is ashaft 20and forward of the opening are stub shafts 2l. Fixed on leachend of the shaft 20 is an upwardly and forwardly directed arm 22 havinga horizontal, forwardly opening U-shaped socket 23 and fixed on eachstub shaft 21 are upwardly and rearwardly directed arms 24 havinglateral studs 25 provided with rollers 26 which seat in the socket 23 toform a toggle joint between the arms 22\and 24.

Journaled on studs 27 on the extensions 5 and 6 adjacent the shaft 21are bell crank levers 28, one end of each of which isfixed to the shafts21 and connected with the other arm of each of said levers is a spring29 im anchored to the frame to yieldingly rotate the bell crank lever toswing the shafts 21 in an arc as presently described. Also fixed to theshaft 20 is an arm 30 having a slot 31 in which is adjustably anchoredthe bolt 32 of a pitman 33 receiving reciprocatory movement from a cam34 on the main shaft 35 through a lever 36 pivotally mounted on the stud37 on the adjacent frame standard and having a slot 38 within which thebolt 39 on the pitman is adjustably mounted, the lever 36 having aroller 40 to provide anti-friction bearing with the periphery of thecam. The cam 34 is of the jump-off type providing for quick return ofthe parts of the toggle levers 22 and 24 under influence of the spring29.

Mounted on the paired arms 22 and 24 and extending transversely acrossthe machine beneath the center of the table opening 19 are shafts 41, 42carrying friction rollers 43 and 44 held in yielding contact by theaction of spring 29, the shaft 42 being at slightly greater elevationthan the shaft 41 and the rollers beinglof the same diameter so thatwhen the toggle levers are rocked against the tension of spring 29 uponoperation of the pitman, the roller '44 rises into contact with theforward part of the bottom blank of a stack on the table and the rollersbeing constantly rotating in a downwardly feeding direction, throughmechanism presently described, the roller 44 will, when it engages theforward part of the bottom blank in the stack, push such part rearwardlybeneath the stack. Weight of the stack preventing displacement of thebottom blank along the table, a downward fold is formed in the blank andthe folded blank, being projected be tween the rotating rollers, ispulled downwardly between the rollers, thereby folding the blank to formfront and backflaps for an envelope, later formed in the machine.

riihe stack is so adjusted on the table that the front flap is of lesswidth than the rear flap to leave a sealing Hap on the blank. (Figs. 8to 14.)

In order to adjust the stack to vary pressure of the blanks on thefeeding roller, we mount auxiliary table plates 45 and 46 in the opening19. These plates are pivotally mounted by arms 47 and 48' on transverseshafts 49 and 50 j ournaled in the sides of the frame extensions 5 and 6so that when the shafts are rotated, the inner edges of the extensionplates are raised and lowered to lift or lower the stack relative to theforwarding rollers 43 and 44 and thereby determining the elevation atwhich the forwarding roller 44engages the bottom blank of the stack andthe resultant pressure -of the contact. Adjustment through the auxiliaryplates 45 and 46 is effectedl by levers 51 and 52 fixed to the shafts 49and 50 and set screws 53 and 54 carried by the table 7 and engageablewith the levers to rock the auxiliary plates on their shafts 49 and 50.

Referring now to the primary scoring and gumming mechanism, to 59designate shafts-journaled in the extensions 5 and 6 of the main framein vertical train and fixed on the shafts 55 to 59 are forwarding rolls60 to 64 inclusive.

and 64 designate pressure rolls cooperative with the forwarding rolls 60to 64 for conducting the blanks downwardly from the initial forwardingrolls to a change of direction platform presently described. Thepressure rolls 60 and 63 are on fixed axes 55 and 58 and the rolls 62and 64 are on movable axes for the purpose presently disclosed. Theshafts 56 and 57 forming the axes for the pressure rolls 61 and 62 aremounted on arms G5 and 66 both fixed on a shaft 67 journaled in theextensions 5 and 6 ofthe main frame so that these pressure rolls may bemoved away from their mating forwarding rolls and out of contact withthe descending blankby anarm 68 fixed on the shaft 67 and having aroller 69 engageable by a cam 7 O on a shaft 71, also journaled in theextensions 5 and 6, the roller 69 being held in its engagement with thecam and the pressure rolls 61 and 62 in contact with their matingforwardrolls by a spring 72 connected with arm 63 and to the frame.

interposed between the forwarding rolls 62 and 63 is a shaft 73journaled in the frame extensions 5 and 6 and carrying a sleeve 74 onwhich is a stop blade 75 reciprocable into and from the path of blankspassing through the forwarding train, to interrupt travel of the foldedblanks.

The sleeve 74 is operable by a gear segment 76 on a bell crank lever 77pivotally mounted on shaft 58 and having a roller 78 yieldingly heldagainst a cam 79 fixed on the shaft 71 journaled in the frame extensions5 and 6 by a spring 81 connected with the crank arm and with one of theframe extension members.

It is desirable, irrespective of the size of the envelope being formed,that the folded blank be fed positively in its travel from the table,but in order to synchronize the feed with scoring and gumming elements,the blanks must be brought to a universal starting position beforeentering the portion of the train containing the scoring, and gummingmembers. In order to accomplish this positioning of the blanks and toeffect proper alignment thereof, we release the blanks from the upperforwarding rolls to permit the blanks to drop freely upon the stopblade. This release is effected through shift of the arms and 66carrying the pressure rolls 61 71 and engageable with a roller 69 on thecrank arm 68 and yieldingly retained in contact with the cam by thespring 72 heretofore mentioned.

. and 62 through the cam 70 fixed on the shaft f -pressure rollersengage the top The paired rolls 63 and 63 immediately beneath the stopblade `are provided respectively with a longitudinal groove 84 and blade85 adapted to mesh and score the blanks for side sealing ila s, asindicated by the line 86 in Figs. 8, 9 an 10.

Deli/very' of the blanks by the stop blade to the scoring rolls may Abetimed by adjustment of thecam 70 on shaft 71.

While the blank is passing between the rolls' 64 and 64 the back fla l87of the folded blank is gummed along its ree edge by a blade 88 mountedvon ears 89 carried on collars 9,0 fixed in spaced relation on the shaft71 and so ad-- justed as to time contact of the blade 88 with the blankas' the edge of the flap 87A reaches a center line relative to theforward-v ing roll 64. The pressure rollers 64- mating with theforwarding rolls 64 are at the' outside of the collars 90'so that theblade 88 may travel between the pressure rollers, the arrangementpreferably being such that the and bottom flaps 91 and 92 of the blank.

`The gumming blade 88 receives gum durpositioned in' the pan so that itdips glue therefrom and applies it to the transfer roller 95, which inturn transfers the glue to the blade 88. The roller 102 is vdriven by apulley 103 fixed on the roller shaft and actuated by a crossed belt 104running over a pulley 105 rotatable upon a stub shaft 106 carried on theside frame 6, the pulley 105 being driven as hereinafter described toactuate the glue applying roller 102.-

After the blank has been glued, it travels downwardly between a frictionforwarding roll 107 and pressure rollers 108, the forwardling roll 107being rotatably mounted in the side frames 5 and 6 and the pressurerollers 108 rotatably mounted upon arms 109 fixed on a transverse shaft110 which is also provided with `arms 111 for supporting the pressurerollers 64. Theshaft 110 is rocklce able by a cam 112 fixed on a shaft113 rotatably mounted at the rear end of the bed plates 3 and 4.Projecting laterallyv on the shaft 110 is an arm 114,carrying a roller115 contacting with the cam 112 so that when the roller 115 drops into alow lobe 116 of the cam under the influence of springs 117 and 118attached to the arms 109 and 111 respectively, the pressure rolls 64 and108 are lifted from contact with their mating rolls to permit the blankto drop upon a platform 119 mounted transversely of the machine andsloping downwardly and rearwardly so that the blank slides downwardly onthe platform'in position ready for change of travel as here# .lnafterdescribed.

Yieldingly supported below .the carrying friction- 'roll 107 and linrotative contact therewith is a complementary friction roll 120 mountedat the end of a pair of arcuate levers 121 that are ivotally supportedon studs 122 projecting inwardly of the `upward extensions 5 and 6, thelever 121 being pro-, vided with projecting arms 123 which are engagedby .compression springs 124 supported upon lugs 125 projecting inwardlyof the side frame extensions, to support the Vroller 120 in yieldingcontact with the roller 107. Downward travel of the blank upon the shaft119 is interrupted by a stop finger 126 whenthe score 86 of the blank isin alignment with' the contact point of the rollers 107 and 120 so thatthe blank is in position to be fed between the rollers and started Ithroughthe horizontal train as later described.

The stop fingers 126 comprise hook-shaped members 127 pivotallysupported on pins 129 carried at the free end of adjusting levers 130.The hook-'shaped fingers rest upon the sloping shelf and are sopositioned thereon by the-adjusting levers 130 that they engage the sidefold of the blank and interrupt its travel as soon as the score line isin properl springs 134, attached to the arms and to the side framestandards 1 and 2. Thus it is readily apparent that the hook-shapedfingers may be positioned correctly on the platform according to thesize of the blank by manipulation ef the adjusting screws 132,

after which the adjusting screws may be locked with relation to the armsby lock nuts threadedly received on the adjusting screws and engagingthe arms.

In order to expel air that may be trapped between the flaps of theblank, we mount a pressure plate 136 in 'spaced relation with the uppersurface of thesloping platform and above the blank. The pressure plateis of' a spring-like nature and fixed at its rear end toa rod 137rotatably mounted in the bed plates slightly above the lower end of theplatform, and fixed to `the rod 137 is a lever 1 38 carrying a roller139 engaging the peto rotate the rod 136 in an anti-clockwise directionto move the pressure plate into pressing contact with the blank, thusexpelling air from between the iaps so that the flaps will lie closelytogether when passing between the friction sealing rolls. As soon as theroller 139 is disengaged from the hi h lobe of the cam, a spring 142returns t e pressure plate to normal spaced position above the slopingplatform and the blank is ready to be fed between the friction rolls 107and 120 to seal the side flap 143 as now described.

Fixed on a transverse shaft 144 carried by the side frames below thesloping platform are upwardly extending spaced arms 145 carrying attheir free ends an arcuate pusher or tucker plate 146 adapted to engagethe score line 86 and upon anti-clockwise rotation of the shaft 144 andtuck the blank between the friction rolls 107 and 120 so that the blankis frictionally engaged thereby to feed the blank into the horizontaltrain of carrying rolls and at the same time pressing the side iap intosealing contact with the back flap. rlhe pusher plate is actuated by acam 147 fixed on a transverse shaft 148 mounted between the bed plates,the cam contacting a roller 149 carried at the free end of an arm 150fixed to the shaft 144.

The blank now moves over a horizontal train of rollers designated 154 to168, the rollers being fixed on shafts 169 rotatably mounted in the bedplates 3 and 4.

1n order to provide a smooth even course for the blanks as they passoverthe carrying rolls 154 to 168, the bed plates are provided with ia table170 extending therebetween and having a plurality of rectangularopenings 171 through which the rolls project, the spacing between therolls being bridged by the table portions 172 between the openings 171.

As the blanks move on to the horizontal train of rollers they pass undera triple set of pressure rollers 154 mating with the table roll 154 andnormally restrained from engagement with the table roll 154 so that theglued side iap'may pass freely therebetween without the pressure rollerssqueezing the glue from beneath the flap, but as soon as the Hap haspassed the pressure rollers, the rollers are automatically lowered ontothe table roll 154 to feed the blank onward into the machine.` Thepressure rollers are lowered by a cam 173 which contacts with a roller174 fixed at the end of an arm 175 attached to a shaft 176, carried bythe side frames 5 and 6 above and to the left of the pressure rollers,and on which the pressure rollers are also mounted by an arm 177. Aspring 178 attached to a vertical arm 179 on the shaft 176 normallyretains the pressure rollers out of contact with the table roll and thecam roller in contact with its cam 17 3.

The blank then passes beneath a complementary set of rollers 155 andover the table roller 155, the pressure rollers 155 beingsupportedbyarmsl80projectingrearwardlyfrom the shaft 176. As soon as thehigh lobe of the cam 173 has engaged the roller 174 on the arm 175 tobring the rollers 154 into contact with the blank, the pressure rollers155l are lifted from contact with the roll 155 against the iniiuence ofthe spring 178 so that the glued flap may pass thereunder withoutcontacting the pressure rolls 155 in exactly the same manner as whenpassing beneath the pressure rollers 154. Thus it is readily apparentthat as soon asthe flap passes the rollers 154 the cam 173 causes therollers to engage the table roll to continue the feed of the blank andat the same time the rollers 155 are lifted from the table roller 155 topermit free passage of the flap, but as soon as the fiap portion of theblank passes the rollers, the cam has moved out of engagement with thelever arm, permitting the spring 178 to return the pressure rollers 155`into contact with the roll 155 to advance the blank.

About the time that the rollers 155 are in raised position, stop blades181 (complementary to the stop blade are moved into the line of travelof the blank so that the folded edge of the blank just glued abutsthereagainst to align the blank preparatory for scoring of the bottomflaps 91 and 92, the rotation of the table roll 155 being suflicient tomove the blank into engagement with the stop blades while the pressurerollers 155 are out of engagement. The stop blades 181 are carried on ashaft 182 actuated by a gear segment 183 fixed on a stub shaft 184carried by the bed plate 4. The gear segment 183 is provided with anintegral actuating arm 185 which contacts with a cam 186 attached to theshaft of the roller 155 so that when the cam engages the arm, the gearsegment is swung in an arc to move the stop blades into stoppingengagement with the blank and positions it in parallel alignment withthe table roller. rlhe stop ledge is then retracted to its normalposition below the line of travel of the blank by a spring 187 actingupon the sector 183. lt is at this point that the pressure rolls 155again engage the blank to positively continue the feed of the blankalong the ta le and under scoring disks 188 and 189, rotatably mountedabove the roll 156 in position to score the top and bottom flaps of theenvelope as designated at 19() and 191, Fig. 11, the scoring disks beingrotatably mounted upon arms 192 loosely mounted on the shaft 17 6. Theblank is then ready to be passed through the end-Hap folding and sealingportion of the machine as now described.

The mechanism for folding and gluing the end flaps is carried above thetable on a pair of horizontally spaced bars 193 and 193', supported attheir ends by horizontal transverse shafts 194 and 195, removablyrxsupBorted at their opposite ends in U-shaped seats 196 formed in theupper ends of colums 197 and' 198 projecting upwardly from the bedplates 3 andl 4 as shown in Fig. 1. Yieldingly supported by the bars 193and 193 are pairs of pressure rollers 157 to 168v complementary to thetable carrying rollers 157 to 168 respectively, each pressure rollerbeing rotatably mounted in an angle-shaped bearing member 199 (Fig. 7)provided with a rod 200 slidable through openings 201 in the bars 193and 193', the rods being provided with reduced extensions 202 whichextend through complementary bars 203 and 204 carried in parallelalignment .above the bars 193 and 193 and retained therein by adjustingnuts 205 threaded on the reduced extensions and engaging the' top edges'of the bars 203 and 204. Compression springs 206 4engage the lower sidesof the bars and bear against the shoulder portions of the rods formed bythe reduced extensions so that the pressure rollers are heldin'fyielding contact with their -tracks are spaced slightly above thetable to permit passage of the blanks and extend rearwardly thereover toadjacent the roller 161.

' The folding wings comprise flat vertical strips extendinglongitudinally of the table along'the outside edges of the foldingtracks 210 and-211 and are supported by vertical f rods 214 fixed 'tothe bars203 and 204, the Y forwardlends 215 of the strips being twistedlaterally and into substantially horizontal planes at their ends whichproject slightly below the table through Anotches 216 so that the endflaps of the blanks pass readily thereover and are guided to a verticalposition along the sides of the folding tracks.

The blanks are then conducted along the table with the end aps invertical position ready to be engaged by a pair of folding wings 217 and218, pivotally supported above the roll 160 at the outside of thefolding tracks and in position to engage the upturned end flaps and foldthem downwardly over the folding tracks as now described. The foldingwings 217 and 218 comprise plates 219 having laterally bent ears 220 forhinging the plates to prjectinglugs 221 onthe bars 203 by pins 222. Thelower ends of the platesn are provided with inbent flanges 223 forengaging the end flaps so that when the lower" ends of the plates areswung inwardly, thel flanges engage the-end flaps and spread them lofthe wing smoothly over the tops of the foldin tracks.

The folding wings are actuated y cams 224 mounted on a vertical shaft225, projecting upwardly from the bed plates 3 and 4 and rotatableinarms 226 on the bed plates by bevel gears -227 fixed on the lower endsof the shafts and meshing with the bevel gears 228 on the shaft of theroll 160.

Mounted below the cams 226 are flanged collars 229 engaged by yokes 230of reciprocating arms 231 carrying rollers 232 in engagement with thecams. The arms 231 are also provided with a vertical post 233 having anopening 234 adjacent its upper end to slidably receive a connecting rod235 connected to ears 236 on the folding wings by pins 237 sothat whenthe high lobe of the cams, ro-

tated by the gears 227 and 228, engage the rollers on the arms 231 tocause them to be moved laterally toward the folding wings the connectingrods will swing the folding wings into flap folding position.

As soon as the cams move out of engagement with the rollers, the wingsare returnedv nto normal position by springs 238, attached to the yoke230. The connecting rods are adjustably mounted in the openings 234: by

' set screws 239.

As the blanks move out of engagement with the folding track, they enterbetween the roll 161 and a pair of pressing rollers 161 which engage theblanks over them end flap folds to positively crease the folds. The topflaps of the blanks then engage under a retaining bar 241 which retainsthe top flaps in folded position during the remainder of the travelthrough the machine, the bar being suspended by rods 242 from the bars203, as shown in Fig, ,1. The bottom flap, as it leaves the pressingrollers 161 engages a flap opening wing 243 to open the flap forreceiving gum -as now described.

The opening wing (Fig. 6) comprises a strip having @hook-shaped knifeedge 244 on its forward end for engaging under the flap, and rearwardlyof the hook-shaped knife edge 244 the strip increases progressively incross section, as at 245, so that the v flap being progressively engagedthereby, is returned to a horizontal position as shown in Figs. 6 and13. The opening wing 243 is supported from an offset arm 246 projectingrearwardly of the folding track 211 and attached to the end of thehook-shaped edge As the blank co"'"tinues through the machine, it passesunder .a glue applying disk 247 rotatably mounted on a shaft 248supported adjacent a glue pan 249 which is suspended from the bars 193and 193A (complementary to the glue pan 99) containing glue vfor gummingthe bottom iaps, the glue being applied vfrom the rollerv 251 to theroller 250, the roller 251 being drivenby a spur'gear 252 meshing with aspur gear 253 on the roller shaft 163. In order to provide light contactof the gluing disk with the blanks, the table is hollowed out as at 254so that the blank may move away from the disk and only a wiping contactwith the blankis provided.

After the gum has been applied, the blanks pass over the rollers 165,166 into a flap-closing mechanism now described.

The Hap-closing mechanism includes a flat strip 255 positioned obliquelywith the center line of the table and supported by a rod 256 suspendedfrom the horizontal bar 204, as best shown in Fig. 6. The forward end ofthe strip is inclined downwardly below the surface of the table througha notch 257 so that the opened Hap may readily pass onto the closingstrip and be progressively turned to closing position by contact withthe inner edge 258 of the closing strip.

In order to insure the correct folding of the end flap at its formerfold, we provide a guide strip 259 also suspended from the horizontalbar 204 by a rod 260, the guide strip being in alignment with thefolding rail 211 so that the outer forward edge 261 of the vstrip is inalignment with the former fold. The strip is preferably cut awayrearwardly of the edge 261 so that as the flap is turned back by theclosing strip 255, the flap will be pressed upon the back flap of theblank in sealing position without contacting the guide strip.

The blank is then a completed envelope and passes off the end roll 168upon an endless belt 262 operating over a pulley 263 rotatably mountedoii a shaft 264 in the bed plates, over an idling pulley l265 rotatablymounted onextensions 266 of the bed plates, over a pulley 267 rotatablymounted at the end of the extensions, and then over a pulley 269rotatably mounted on a shaft 270 carried in ears depending from thebottom edges of the bed plates.

The pulley 269 comprises the drive for the belt and is actuated by aworm gear 271 fixed to the shaft and meshing with a worm 272 on a lineshaft hereinafter described. A belt tightener is also provided for thebelt and comprises an arm 273 pivotally mounted on the shaft 270 andcarrying a roller 274 contacting the belt adjacent the pulley 269,tension on the arm 273 being maintained by a weight 275 suspended by arod from the end of the arm.

Rotatably mounted between the bed plates on a shaft 276 is a stackingdrum 277 contacting with the upper surface of the belt adjacent thetable roller 168 so that when the envelopes drop upon the belt theypassbetween the belt and the drum and are carried by the drum into asubstantially vertical position on the belt and stacked on edge againstan abutment 278 slidable over the-rails 279 formed on the upper edges ofthe bed plate extension; thus it is readily apparent as the blanks moveonto the belt in a horizontal fiat position, they are 'righted by thedrum and stacked on the belt ready for removal.

As the stack increases, the abutment 278 slides along the bed plateextensions until a sufficient number of blanks have accumulated, afterwhich the blanks are removed and the abutment 278 returned to positionadjacent the drum 277.

Now referring to the driving mechanism for the various rolls and camsfor actuating the pressure rollers, the vertical train of rollers aredriven from the main shaft 35 by a vertical shaft 280 having a spiralgear 281 on its lower end meshing with a complementary spiral gear 282on the driving shaft. The shaft 280 projects upwardly along the side ofthe upright extension 6, and is provided adjacent each of the rollershafts 56, 57, 58 and 59 with spiral gears 283 (Fig. 5) meshing with thespiral gears 284 on the ends of the shafts 56 to 59. The roller shaft 55is provided with a spur gear 285 meshing with an idler gear 286 mountedon a side frame 6 and meshing with a gear 287 on the roller shaft 56 andthe friction roller 43 is driven by a spur gear 288 meshing with anidler gear 289 on the side frame which is driven by a gear 290 on theroller shaft 55 (Fig. 5).

The pulley 105for actuating the gluing mechanism for the side flap isdriven by a pulley 291 on the shaft 71 by a belt v292the shaft 71 beingrotated by a gear 293 fixed on the shaft and meshing with a gear 294fixed on the roller shaft 59 (Fig. 2).

The horizontal train of rollers 154 to 168 n inclusive are driven from ashaft 295 mounted horizontally along the side of the bed plate 4, androtated by bevel gears 296 and 297 'wom the vertical shaft 280. thehorizontal shaft 295 being provided adjacent each of the rollers withspiral gears 298 meshing with spiral gears 299 xed on the ends of theroller shafts. The worm 27 2 before mentioned for driving the stackingbelt is also mounted upon the end of the horizontal shaft.

-The cam shaft 113 is driven from the main shaft 35 by an inclined shaft300 having a spiral gear 301 on its lower end meshing with the spiralgear 282 on the driving shaft, the gear 301 being positioned oppositelyto gear 281 on the shaft 280. At the upper end of the inclined shaft 300is a spiral gear 302 meshing with the spiral gear 303 on the cam shaft113. The cam shaft 148 is driven from the cam shaft 113 by a chain 304running over sprockets 305 and 306 fixed at the ends of the respectiveshafts (Fig. 1).

In order to provide for quickly raising the pressure rollers 157 to 168to remove crumpled blanks which may become jammed in the iap formingmechanism, the bed plates are provided adjacent to columns 197 and 198with pivoted levers 307 having seats 308 for the shafts 194 and 195.Adjacent the seats 308 is a hook-shaped extension 309 having 194 and 195and re-seat'them 1n the seats 308, which restores thepressure rollers innormal l travel of scoring rolls 63 and 63 so that the` complementaryseats310. Integral with the plvoted arms are handle members 311 by whichthe arms 'may be rocked rearwardly toy causethe shafts194 and 195 to beraised upwardly 1n their yokes and seated in the complementary seats310, thus raising the pressure rollers to permit removal of thecrumpledblanks, after `which the arm may be rocked in the reversedirection to lower the shafts contact'with the carrying rolls.

'In operating a machine constructed and assembled as described, theenvelope blanks are placed in a stack upon the table 7 and supportedbythe posts 15, after which the frame 9 is manipulated to position thestack in position y.over the feed rollers 41 and42 so that when theblanks are fed into the machine the initial side fold is produced in theproper place The cams 70 and 79 are then adjusted o n their shafts sothat the stop blade 75 is swung intoposition to interrupt travel of theblanks in proper timing relation to the score for the sealing flaps ismade in the propA er place on the blank and the rollers 61 and 62 areraised according to the timing adjustment of the stop blade.

The stop lingers 126 are then adjusted by manipulating the adjustingscrews 132 so that the blank is positioned upon the sloping platformready to be tucked between the friction rolls 107 and 120 to feed theblank into the horizontal train of rollers. The cam 184 is then adjustedto move the stop ledge 181 into position to interrupt the travel of theblank, the cam 173 also being adjusted to raise the rollers 154 and 155according to the size of the sealing flap. j

The end fiap folding and gumming mechanism, mounted' upon the bars 193and 193 is then adjusted laterally according to the width of the blankby moving the bars 193 and 193' on their supporting shafts 194 and 195.A gluing' disk 247, of the required diameterfor applying gum to the endflap is applied to the shaft'248 and the machine is then ready foroperation. The Iblanks are drawn into the machine by the rollers 43 and4 4 to produce the initial fold and feed the blanks downwardly into thevertical train of rollers where the sealing Hap is scored and m appliedto the back iap, after which the lank drops on tothe sloping platform119 where it is fed by. the tucker 146 between sealing rolls to sealthel side Hap and feed the blanks into the horizontal train of rollers.i v,

The end flaps are then scored by the scoring disks ,188, after which theblanks pass under the folding tracks 210 and 211 and the end flapsfolded over the rails by the folding wings 217 `and 218. The foldsformed 'over the folding tracks are then crea'sed by the the blankpasses on to the folding guide 255 and the end flap is folded over theback iiap and sealed by the sealing roller 312 completing the envelopewhich drops upon the belt 262 and is carried into stacking position bythe stacking drum 277, as before described.

From the foregoing it is readily apparent that we have provided amachine well adapted to the purpose for which it is intended and havinga substantial increase in capacity over present machines due to thepeculiar construction whereby the blanks are initially folded in thefeeding operation. It is also apparent that we have provided a machinerequiring a minimum of floor space thereby increasing factory capacityin that a greater number of machines maybe installed in a given floorspace.

What W'e claim and desire to secure by Letters Patent is:

1. In an envelope making machine, a table for supporting a stack ofblanks, having a delivery opening, a series of forming members arrangedin vertical train beneath said opening, means for delivering blanks fromthe stack through the opening to said train, a series of forming membersarranged in horizontal train, and means for diverting partially formedblanks from the end of the vertical train into the horizontal/train. y

2. In an envelope making machine, a table for supporting a stack ofblanks, means including a forwarding roll for removing blanks from thestack, means effecting intermittent contact of said roll with the bottomof the stack, and envelope forming means operable on the blanksfollowing removal of the blanks from the stack by said removing 3. In anenvelope makino machine, a table for supporting a stack of: blanks,means including a forwarding roll for removing blanks from the stack,means for reciprocating said forwarding roll toward and from the stackin a fixed path, adjustable means for spacing the stack relative totheforwarding roll, and 'envelope forming means.' operable on the blanksfollowing removal of the blanks from the stack by said removing means.

4. In an envelope makingV machine, a table for supporting a stack of banks havin al delivery opening, means for removing lanks from the stackincluding rolls, rotatable into circumferential Contact and planetaryabout diferentaxes to effect enga ement of one only of the rolls withthe bottomlank of the stackl and envelope forming means operable on theblanks following removal of the blanks from the Astack by said removingmeans.

5. In an envelope lmaking machine, a table for supporting a stack ofblanks having a tiO delivery opening, means for removing blanks from thestack` including rolls rotatable into circumferential contact andplanetary about different axes to effect engagement of only one of therolls with the bottom blank of the stack, means for intermittentlyreciprocating the rolls in this planetary path, blanks following removalof the blanks from the stack by said removing means.

6. In an envelope making machine, a table for supporting a stack ofblanks, having a delivery opening, pivotally connected arms rotatablymounted on spaced axes, contacting rolls rotatably mounted on therespective arms, means yieldingly urging the arms to retain the rollsaway from the stack, means for reciprocating the arms to effectintermittent contact of one of the rolls with the stack, and envelopeforming means operable on the blanks following removal of the blanksfrom i the stack by said removing means.

7. In an envelope making machine, a table for supporting a stack ofblanks, .having a delivery opening, pivotally connected arms rotatablymounted on spaced axes, contacting rolls rotatably mounted on therespective a1'ms,'means yieldingly urging the arms to retain the rollsaway from the stack, means for reciprocating the arms to effectintermittent Contact of one of the rolls with the stack, means forrotating the rolls in a direction to withdraw a blank interposedtherebetween from the stack, and envelope forming means operable on theblanks following removal'of the `blanks from the stack by said removingmeans.

8. In an envelope making machine, a table for supporting a stack ofblanks, having a delivery opening, pivotally connected arms rotatablymounted on spaced axes. contacting rolls rotatably mounted on respectivearms in different horizontal planes, means yieldingly urging the arms toretain the rolls away from the stack, means for reciprocating the armsto effect intermittent contact of one of the rolls with the stack, andmeans for rotilting the rolls in a direction to withdraw a blankinterposed therebetween from ,the

stack, and envelope forming means operable on the blanks followingremoval of the blanks from the stack by said removing means.

9. In an envelope making machine including blank forming mechanism,means for support-ing a stack of-blanks, means for removing blanks fromthe stack, a vertical series of forwarding rolls, means for rotatingsaid rolls, a mating pressure roll for each forwardmg roll, some of thepressure rolls being carried in arms having fixed mounting on a commonaxis, a stop member for timing travel of the blank with relation to theforming mechanism, and cam mechanism for shifting sa1d axls toreciprocate the pressure rolls to release pressure on the blank forallowing the blank to contact the stop member.

10. In an envelope making machine, blank forming mechanism, means forsupporting a stack of blanks, means for removing blanks from the stack,a vertical series of paired forwarding rolls in position for receivingblanks from the removing means, a stop interposed insaid train fortiming the blanks with relation to the blank forming mechanism, and avgear segment operable with one of the rolls in operable relation withthe stop.

11. In an envelope making machine, means for supporting a stack ofblanks, means for removing blanks from the stack, a vertical series ofpaired forwarding rollsl in position for receiving blanks from removingmeans, a stop interposed in said train, and a gear segment operable withone of the rolls in operable relation with the stop, and tbe members ofone pair of rolls having respectively a longitudinal scoring groove anda complementary blade.

12. In an envelope making machine, a table for supporting a stack ofblanks, means for receiving blanks separately from the stack, a verticaltrain of forwarding rolls, means interposed in said train for creasing aflap on a blank during its passage, blank supporting means at the end ofsaid train, paired forwarding rolls adjacent said means, and areciprocating blade engageable in the crease of the blank to deliver theblank to said last named rolls.

13. In an envelope making machine, a table for supporting a stack ofblanks, means for removing blanks separately from 'the stack, a verticaltrain of forwarding rolls, means interposed in said train for scoringthe blank during its passage, blank supporting means at the end of saidtrain, paired forwarding rolls adjacent said means, and a reciprocatingblade engageable in the score of the blank to deliver the blank to saidlast named rolls, one of said last named rolls beingshiftable to permitdelivery of the blanks to said supporting means.

14. In an envelope making machine, a table for supporting a stack ofblanks. means for removing blanks separately from theI stack, a verticaltrain of forwarding rolls, means interposed in said train for creasingthe blank during its passage. blank supporting means at the end of saidtrain, paired forwarding rolls adjacent said means, and a, reciprocatingblade engageable in the crease of the blank to deliver the blank to saidlast named rolls and a horizontal train of paired rolls for forwardingblanks delivered by said last named rolls.

15. In an envelope .making machine, a table for supporting a stack ofblanks, means for removing blanks separately Vfrom the stack includingmeans for folding the blank to produce front and back flaps, a verticaltrain of forwarding rolls, means interposed in said train for scoringthe blank during its passage, an inclined table .at they end of saidtrain, an adjustable stop for envelopes delivered to said table, ashaft-rotatable adjacent the inclined table, a plate* carried by saidshaft and overlying said table, a lever on saidv shaft, a roller on saidlever, a rotatable cam, and means yieldingly urging said roller toengagement With the cam to effect intermittent pressure movement of theplate toward said table to remove air from between the flaps of theblank.

16. In an envelope making machine, means for feeding blanks into themachine, means for'conveying the blanks uthrough the machine, and meansfor forming the blanks into envelopes including end flap forming'mechanism comprising spaced folding tracks beneath which the blanks areconveyed, means movable into engagement with the end flaps on the blanksfor folding the end flaps over the tracks, and pressing rolls forcreasing the folds formed over the tracks.`

17. In an envelope making machine vmeans for feeding blanks into themachine, means for conveying the blanks through the machine, and meansforming the blanks`into envelopes including end flap forming mechanismcomprising spaced folding tracks beneath which the blanks are conveyed,guide lWings adjacent the tracks forl engaging the y end flaps of theblank to guide the flaps into engagement with the tracks, foldingmembers movable into position to fold the flaps over, the tracks, andpressing rollers for creasing the folds formed'over the tracks.

18. In an envelope making machine means for feeding blanks into themachine, means for conveying the blanks through the machine, and meansforming the blanks into envelopes including iiap forming mechanismcomprising spacedfolding tracks beneath yvhich the blanks are conveyed,guide Wings adjacent the tracks for engaging the flaps of the blank toguide the flaps into track engagement, pivoted Wings for foldingthe iapsover the tracks, reciprocating arms for actuating the Wings, cam meansfor reciprocating the arms, and means for creasing theI folds formedover the tracks.

19. In an envelope making machine, means for 'feeding blanks into themachine, means for conveying the blanks throughthe machine, and'meansJforming the blanks into envelopes including flap forming mechanismcomprising spaced folding tracksl beneath' which the blanks areconveyed, means for folding the -laps over the tracks, pressing rollsfor creasing the folds formedvover -the tracks, flap opening means,agumming disk for applying gum tothe blanks adjacent' the iap openingmeans, and means forclosing the .Opened flap in sealing contact with thegum.

` over the tracks.

for feeding blanks into the machinemeans i for conveying the blanksthrough the ma# chine, and means forming `the blanks into envelopesincluding flap forming mechanism comprising spaced folding tracksbeneath which the blanks are conveyed, means for lfolding the iaps. overthe tracks, pressingv rolls for creasing the folds formed over thetracks, flap opening means, a gumming disk for applying gum to theblanks adjacent the flap opening means, and a guide strip positionedobliquely to the travel of the blank to guide the opened flap' intosealing contact With the gum. y

21. In an envelope making machine, means for feeding blanks into themachine, means for conveyingthe 'blanks through the machine, and meansforming the blanks into envelopes including flap formingmechanismcomprising spaced folding tracks beneath Whichthe blanks are conveyed,means for folding the flaps over the tracks, pressing rollsA forcreasing `the folds formed over the tracks, fiap opening means, agumming disk for applyinggum to the blanks adjacentl the ap openingmeans, a guide 'strip cooperating with the closing means for assuringthe closing of the flap on thecrease formed by the pressing rolls.

. 22. In an envelope making machine, means for feedingblanks into themachine, means for conveying theA blanks through the machine, and means`forming the blanks into envelopes including iap forming mechanismcomprising disks for scoring the aps, spaced folding tracks in alignmentwith the scoring disks, means for folding the aps over the foldingtracks on the score` lines formed by the scoring disks, meahs forreopening oneof the flaps, means for applying gum to the open flap, andmeans for sealing the Hap.

23. In an envelope making machine, flap forming mechanism comprising aframe, a train of forwarding rolls carried by the frame for conveyingenvelope blanks, pressure rollers complementary to the forwardingrollers, spaced bars for supporting the pressurelrollers, meansyeldingly urging the pressure rollers into' Contact with the forwardingrolls, flap forming tracks suspended from the bars, means for foldingflaps of the blanks over the tracks, pressing rolls in line with thetracks for creasing the /fold formed 24. In an envelope making machine,Hap forming mechanism comprising a frame, a train of forwarding rollscarried `by the frame for conveying envelope blanks, pressure rollerscomplementary to thel forwarding rolls, spaced bars for supporting thepressure rollers, means for raising the bars to lift the pressurerollers out of contact with the forwarding rolls, means yieldinglyurging the pressure rollers into contact with `the forwarding rolls,flap forming tracks ing mechanism comprising a frame, a train of'forwarding rolls carried by the frame for conveying envelope blanks,pressure rollers complementary to the forwarding volls, spaced bars forsupporting the pressure rollers, shafts connecting the bars, columns onthe frame `for seating the shafts to support the bars, cam lever meansfor lifting the shafts from seating engagement with the columns to liftthe pressure rollers from contact with the forwarding rolls, means forforwarding blanks from said stack singly to the Hap-forming means, andmeans for delivering formed blanks from the machine.

26. In an envelope making machine, a table for supporting a stack ofblanks having a delivery opening, a frame supported on the table, stackengaging arms adjustable on the frame, means for adjusting the frame toposition the stack over the delivery opening, means for deliveringblanks singly from the stack, and flap-folding and sealing mechanismadapted for` receiving the blanks from said delivery means.

27. In an envelope making machine, a table for supporting a stack ofblanks, means, in'- cluding a forwarding roll for removing -blanks fromthe stack, means for reciprocating said forwarding roll toward and fromthe stack in a fixed path, means for adjusting the stack laterally ofthe forwarding roll, adjustable means for spacingthe stack relative tothe forwarding roll, and flap-folding and sealing mechanism adapted forreceiving blanks from the forwarding roll.

28. In an envelope making machine, a table for supporting a stack ofblanks, means, including a forwarding roll, for removing blanks from thestack, means for reciprocating said forwarding roll toward and from thestack in a fixed path, and adjustable means for spacing the stackrelative to the forwarding roll, comprising spaced plates for engagingthe stack adjacent the sides of the roll, pivoted arms supporting theplates, and flap-folding and sealing mechanism adapted foi*1 receivingblanks from the forwarding ro 29. In an envelope making machine, a tablel for supporting a stack of blanks having a delivery opening, meansincludingia forwarding roll for removing blanks from the stack throughthe table opening, means for 'reciprocating said forwardin roll towardand from the stack in a fixe path, plates supported in the/table openingadjacent the forwarding roll, arms pivoted below the table andconnecting the plates to raise'or lower the stack with relation to theforwarding roll, yscrew means for adjusting the levers, and flap-foldingand sealing mechanism adapted for receiving blanks from the forwardingroll.

30. In an envelope making machine, a table for supporting a stack ofblanks, means for removing blanks separately from the stack said meansmaking an initial sidefold of the blank to provide front and back flaps,a vertical tr'ain of forwarding rolls, means interposed in saidtrain-for scoring the front flap to provide a sealing flap, means forgumming the back flap, blank supporting means at the end of said train,paired forwarding and sealing,rolls adjacent said means, a reciprocatingblade engageable on the score line to deliver the blanks through saidlast named rolls, a second train of forwarding rolls in line with thelast named rolls, pressure rollers in Contact with the first of saidlast named train of forwarding rolls, and means for raising the pressurerollers from contact with the blanks during the interval at which thesealed flap passes under the pressure rolls.

31. In an envelope making machine a table for supporting a stack ofblanks, means for removing blanks separately from the stack said meansmaking an initial side fold of the blank to provide front and backflaps, a vertical train of forwarding rolls, means interposed insaidtrain for scoring the front flap to provide-a sealing flap means forgumming the back flap, blank supporting means at the end vof said train,paired forwarding and sealing rolls adjacent said means, a reciprocatingblade engageable on the score line to deliver the blanks through saidlast named rolls, a second train of forwarding rolls in line with thelast named rolls, pressure rollers in contact with the first of saidlast named train 'of forwarding rolls, pivoted arms supporting thepressure rollers, and cam means for actuating the arms to lift thepressure rollers from contact with the blanks permitting free passage ofthe sealed flaps to prevent displacement of the uiidried gum.

32. In an envelope making machine, a table for supporting a stack ofblanks, means for removing blanksy separately from the stack said meansmaking an initial side fold of the blank to provide front and back flapsa vertical train of forwarding rolls, means interposed in said train forscoring the front flap, to provide a sealin flap means for gumming theback flap, blank supporting means at the end-of said train, pairedforwarding and sealing rolls adjacent said means, a reciprocating bladeengageable on the scoreiline to deliver the blank through said lastnamed qrolls, a second train of forwarding rolls in line with the lastnamed rolls, pressure rollers in contact with the first of said lastnamed train of forwarding rolls, pivoted arms supporting the pressurerollers,cam means for tion for receiving blanks from the removing 33. Inan envelope making machine, meansfor supporting a stack of blanks, meansfor delivering blanks individually from the stack, blank creasing andgumming mechanism beloW the delivery means, a stop member forinterrupting travel of the blanks to time the blanks With relation tothe creasing and gumming mechanism, and means for re* ciprocating thestop member to and from position for interrupting travel of the blanksthe movement of the stop member being adjustable to adapt the machinefor blanks of different dimensions. n

34. In an envelope'making machine, means for supporting a stack ofblanks, means for delivering blanks individually from'4 a stack, meansfor creasing the blanks, a stop member, means for reciprocatin the stopmember to and from position ger interrupting travel of the blanks, meansfor timing movement of the stop member for timing travel of the blanksin the machine With relation to the creasing means and to adapt themachine for blanks of different dimensions, a plurality of pairs offorwarding rolls inter'- mediate the delivery means and the stop member,some .of the rolls being movable from and toward their mates to free theblanks for contact with the stop member.

35.- ln an envelope making machine including creasing and gummingmechanism, means for osupporting a staek'bf blanks, means for'delivering blanks individually from 'a stack into the creasing andgumming mechanism, a stop member,and vmeans for reciprocatingthe stopmember to and from position for timing travel of the blanks into thecreasing means and gumming mechanism, means for timing movement of thestop member to adapt the machine for blanks of different dimensions, aplurality of pairs of forwarding rolls intermediate the deliverymeansand stop member, some of the rolFs belng movable toward and from theirmates to free the blanks, and means for shifting the relation With thegear on the stop member, and a cam for actuating the gear segment,thecam being adjustable to'vary timing of th stop movement relative tooperation of the blank removing means.

37. In an envelope making machine', blank forming mechanism, a table forsupporting a stack of blanks, having a delivery opening, means movableto and from the stackfor removing the lowermost blank in the stackthrough theopening, including'means for once folding the blank and meansfor delivering the partially folded blank into the blank formingmechanism.

lny testimony whereof We aiiix oui-'signatures.

' ALFRED WINKLnn. MAX DNNEBiEn.

movable rolls synchronously with movement of the stop member.

36. In an envelope making machine including blank forming mechanism,means for supporting a stack of blanks, means for removing blanks fromthe stack, a vertical series of paired forwarding rolls in posimeans ast op member interposed in said tram for adjusting the blanks in tuningrelation with the forming mechanism, agear on the stop member, a gearsegment in operable

